Last night's A/X Armani ExchangeNeon Carnival at Coachella brought the stars out for a night out in the desert. The carnival-themed event, held at an airport hangar, lasted early into the morning. During the festivities, Julianne Hough, Alex Pettyfer, and Ed Westwick took turns throwing darts, while Emma Roberts hopped on the giant slide. Vanessa Hudgens and her boyfriend, Austin Butler, also took advantage of the rides and took a spin on the bumper cars, while Alexander Skarsgard was spotted making the rounds solo. One unexpected guest at the bash was Clint Eastwood, who played carnival games, sipped beer, and stopped to take some photos with fans.